In Pixar's Cars 2, what is Mater recruited to do after being mistaken for an American spy?

In Pixar's Cars 2, Mater is recruited to investigate a spy plot after being mistaken for an American spy.

Mater becomes involved when British agents Finn McMissile and Holley Shiftwell interpret his unusual behavior as deliberate undercover work. Mater is actually a simple, friendly tow truck, but his accidental observations repeatedly help the agents uncover the conspiracy.

The mystery concerns a group of villains using Allinol fuel and an electromagnetic pulse weapon to cause disasters during the World Grand Prix. Mater's role shifts the sequel toward an espionage adventure, while Lightning remains focused on racing.

The premise can be confused with Mater's later short-film appearances, many of which also parody spy movies or other genres. In Cars 2, however, his central assignment is tied specifically to the international race and the conspiracy surrounding its fuel.